<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="lib/vue.js"></script>
</head>
<body>
<div id="root">
    <p>username--->{{username}}</p>
    <p>age--->{{age}}</p>
    <hr/>
    <child sex="男" :age="age" :username="username"></child>
</div>
</body>
<script>
    new Vue({
        el:"#root",
        data:{
            age:12,
            username:"zhangsan",
        },
        components:{
            "child":{
                props:["sex","age","username"],
                data(){
                    const num=this.age+100;
                    return {
                        num:this.age,
                        age:200
                    }
                },
                template:`
                  <div>
                    <h3>Child</h3>
                    <p>username:{{ username }}</p>
                    <p>age:{{ age }}</p>
                    <p>sex:{{ sex }}</p>
                    <p>num:{{ num }}</p>
                    <button @click="fn">点我</button>
                  </div>
                `,
                methods:{
                    fn(){
                        // console.log("fn",this)
                        // this.age = 200;
                    }
                }
            }
        }



    })
</script>
</html>